Rotary burner



P. F. HOLMGREN Jan. 15,1929.

ROTARY BURNER Filed April 15, 1927 P0? E HOLMG/PEN ATTORN Patented Jan.15, 1929.

PER F. HOLKGBI IN, OF BROOKLYN, NEW YORK.

ROTARY BURNER.

Application filed April 15, 1927. Serial No. 184,036.

This invention relates to oil burners and particularly to apparatus ofthis class of rotary type for use in connection with or as part ofheating apparatus of any kind or class, andparticula-rly furnaces, andthe object of the invention is to provide an apparatusof the classspecified which may be builtinto and made part of a furnace or otherapparatus, or which may be placed in a furnace after removing grate barsand other parts of the furnace. A further object is to provide a burnerof the class described with a rotatable burner head comprising adish-shaped baflle member and an inverted conical memher and steamgenerator disposed above and in spaced relation to said baffle member;and further to the provision of a fan rotatable with said burner headand arranged below the bafie thereofand employed to produce a forcedcirculation of air into and through the burner. A further object is toprovide a combined oil and water feed tube for directing oil and waterto the upper end of said conical member and generator whereby when theburner is in operation, the spray of water into said generator, or thechamber formed therein, will generate steam which together with the fueldischarged into said chamber.

will form a combustible gas having a high degree of heat units. Afurther object is to provide means for transmitting oil and water fromasuitable supply to the lower end of said feed tube and the independentpassages formed therein, and automatically actuated means driven fromthe motor shaft for operating the fan and rotatable burner head forcontrolling feed or transmission of fuel and water to the burner. Astill further object is to provide the oil feed tube with spirallyarranged grooves or passages foreffecting transmission of fuel to theburner head and still further to the provision of an air regulatingvalve controlling the passage of air into burner apparatus centrally ofand below the axial portion of the fan of the apparatus. With these andother objects in view the invention consists of a burner of the classand for the purpose specified which is simple in construction andoperation,'eflicient in use and which is constructed as hereinafterdescribed and claimed.

The invention is fully disclosed in the following s ecification, ofwhich the accompanying rawing forms a part, in which the separate partsof-my improvement are designated by suitable reference characters ineach of the views, and in which Fig. 1 is a diagrammatic sectional viewshowing one method of carrying my apparatus into effect;

Fig. 2 is a plan view of part of the construction shown in Fig. 1, withpart broken away;

Fig; 3 is a section on the line 33 of Fig. 1; 1; ig. 4 is a section onthe line 4-4 of Fig. 1; an

Fig. 5 is a section on the line 5-5 of Fig. 1.

In the drawing I have represented at the boundary lines of the innerlower compartment or compartments of a furnace, that is to say the usualash-pit and fire-box compartments thereof, in which I .have shown myimproved burner. In the construction shown, the burner is made up of ahorizontal frame plate 11 supported upon a plurality of legs 12, andabove the plate 11 1s a supplemental plate 13 spaced from the plate 11by a number of leg portions 13 to form an air space or air admissionpassage 14 between the plates 11 and 13. The plate 13 is rovided with alarge central opening 13 w ich is controlled by an air shutter orregulator 15, consisting of two plates 16 and 17 both having apertures18 adapted to be brought into registering position in the manner ofother devices'of this class. The plate 16 is secured to the frame plate13 while the plate 17 is guided in its movement on the plate 16 byscrews 19 operating in elongated arcshaped apertures 20 (note Fig. 3).

Secured to the lower face of the frame plate 11 is a casing 21 in whichis mounted two helical gears 22 and 23 (note Fig. 4) the gear 22 beingsecured to the inner end of an electric motor shaft 24 which extends outto p the motor 25, partially indicated in Fig. 1 of the drawing. Thegear 23 is secured to a tubular shaft 26 mounted in the casing andprojecting through the upper end thereof and in connection with theupper end of which the burner head is mounted, said head comprising adish-shaped or baflle pan 27 and an inverted cone-shaped member 28forming a fuel generator, and discharge member. A fan 29 is also securedto said shaft below the pan 27 which is spaced therefrom by aspacingring 30 mounted on the shaft, and a similar ring or sleeve 31spaces the pan above the supplemental frame plate 13 and the casing 21,a suitable packing ring 32 being employed between the lower end of thesleeve 31 and the casing 21. The upper end of the shaft 26 is split andthe ring 30 and sleeve is secured to the upper enlarged end 34 of saidsleeve member.

The member 28 consists of inner and outer parts 28 and 28 mounted inspaced relation to form a chamber 36 thercbetween, into which the oiland water are discharged for the generation of steam and ultimateproduction of a gas which is discharged through the open annulardischarge 36 of said chamber 36 adjacent the pan 27.

Mounted within the shaft 26 is an oil and water feed tube 37, said tubebeing provided on the periphery thereof with spiral oil feed grooves 37the lower ends of which communicate with ports 26 formed in the lowerend of the shaft 26, and the upper ends of said grooves open into asmall chamber 38 formed between the part 28 andthe sleeve member 34, andthe part 28 is provided with a plurality of small apertures 39 forplacing the chamber 38 in communication with the chamber .36.

A supplemental casing 40 is mounted at the lower end of the casing 21and coupled" with one side of this casing is an oil supply pipe 41 incommunication with a suitable source of supply as at 42, and the oil inthe pipe 41' passes into a port 43 in the casing 40 and up wardly intoan annular chamber 44 formed between the main and supplemental casings,and the apertures 26 in the shaft 26 are adapted to register with theannular chamber 44 so that the oil will be directed into the spiral feedgrooves 37 in the rotation of said shaft and feed tube 37, the latterbeing pressed or otherwise secured in and to the shaft 26. The watersupply pipe 45 also couples with the supplemental casing 40 andcommunicates, through a port 46, with the bore 37 of the tube 37 theupper end of which is contracted as seen at 47 and opens into thechamber 36 at the peak of the member 28. The shaft 26 and the tube 37rest upon a packing block 40 mounted within the casing 40, and thisblock has ports 46 which register with the port 46 and the bore 37 ofthe tube 37.

Mounted in the pipes 41 and 45 are governor controlled valves 48 and 48respectively, both of which are of similar construction and are providedwith plunger valves 49 moved into closed position by springs 50, and

into open position by levers 51 actuated by means of a sleeve 52 mountedon the motor shaft 24, and actuated by the weights of, a

ing

accompanying drawing and the following statement. In starting the burnerfor operation, the burner head may be heated in any desired manner, forexample, in burning a small amount of fuel discharged through theannular discharge 36 of the conical member 28, and when said member 28has been heated to the desired degree, it being understood that themotor has been put in operation, the fan 29 as well as the pan 27 andmember 28 are retating, a small amount of water is allowed to pass intothe burner and be discharged into the chamber 36 and the heat of'themember 28 will cause the generation of steam which when mingled wit-hthe spray of oil discharged into said chamber through the aperture 39will produce a gas which is discharged at 36, the combustion of whichwill produce a high degree of heat units. T he air supplied to theburner is drawn through the doors at the lower portion of the furnace inwhich the burner is mounted, up through the air regu lator which isadjusted to the desired openand is passed around the bafile 27 and mixeswith the gas just above the peripheral edge thereof, and as itisdischarged from the discharge passage 36 It will also be noted that awall 57 of fire-brick or any other suitable material is built up aroundthe burner head to confine the air to a definite passage upwardlythrough the burner and the flame will extend from the burner headapproxi mately at the discharge 36. As the burner continues to operatethe heat of the member 28 is maintained for the generation of steam andit will also be understood that after the burner has been put intooperation, the motor speed may be increased or decreased by manual orautomatic thermostatic control to regulate the operation of the flamegoverning the required amount that may be desired, at any time, and theincrease or decrease of the speed of the motor will correspondingly andproportionally increase and decrease the transmission of fuel and waterto the burner as well as the supply of air thereto, in the operation ofthe fan 29 which causes a forced draft or circulation of air through theburner.

It will also be noted that whenever desired the member 28 together withthe sleeve 34 may be readily detached, by simply lifting the same offthe shaft 26 for cleaning or other purposes, and when removed the pan 27may also be cleaned. It will also be understood that in the rotation ofthe shaft 26 and tube 37, the oil which will be maintained at the waterpassed into said chamber, the oil is vaporized to facilitate theproduction of a combustible gas as hereinbefore stated.

It will be understood that my invention is not necessarily limitedto thespecific details of construction herein shown and described, nor to anyspecific use of the burner, and various other changes in andmodifications of the construction herein set out may be made, within thescope of the appended claims, without departing from the spirit of myinvent-ion or sacrificing its advantages.

Having fully described my invention,

'what I claim as new and desire to secure by Letters Patent, is a 1. Ina. burner of the class described. a

rotatable burner unit comprising a head member from which a combustibleproduct is discharged, a pan adjacent the discharge end of said headmember, a fan at the opposite side of said pan, a tubular shaft on whichsaid head, pan and fan are mounted, means involving a casing. in saidburner for supporting said shaft, a motor driven shaft extending intosaid casing, a gear on said motor shaft meshing with a gear on saidfirst named shaft for rotating the same and said burner unit, an oilfeed tube mounted in said first named shaft, the periphery of which isprovided with spiral grooves for transmitting oil from a suitable sourcelongitudinally of the shaft and into said head member in the rotation ofsaid burner unit, and the bore of said tube forming a water passage fortransmit ting water from a source of supply to said head member.

2. In a burner of the class described, a

rotatable burner head having a mixing chamin the operation of theburner, means for passing independent sprays of fuel and water into.said mixing chamber to generate a gas which is discharged from saidchamber. an annular chamber formed around the periphery of the dischargeof said burner head, means providing a forced circulation of air throughsaid annular chamber, and a battiemember inter posed between said lastnamed 'means and burner head, the diameter ofsaid bafiie memher beinggreater than that of the burner head. 1 v

3. A burner of the class described including a' burner head consistingof a conical member, said member being composed of separate sheet metalparts mounted in spaced relation to form a chamber within and betweensaid parts, opening outwardly through the periphery thereof in anannular dis-' charge, means for directing separate discharges of oil andwater into the central portion of said chamber, the inner part of; saidhead at the central portion thereof having a plurality of aperturesthrough which oil discharged into said chamber is adapted to pass inspray-like fashion, and said oil and water discharging means comprisinga. feed tube through which the water is'passed, said memberhavin-g'spiral grooves on the periphery thereof forming oil feed groovesw llCh open into the chamber of said head.

4. A burner of the class described including a burner head consisting ofa conical member, said member. being composed of separate sheet metalpartsmountcd in spaced relation to form a chamber within and between said parts, opening outwardly through the periphery thereof in an annulardischarge, means for directing separate discharges of oil and water intothe central portion of said chamber, the inner part of said head at thecentral portion thereof having a plurality of apertures throughwhich oildischarged into'said chamber is adapted to pass in spray-like fashion,said oil and water dismember, said member" being composed of separatesheet metal )arts mounted-1n spaced relation to form a cifamber withinand between said parts, opening outwardly through the periphery thereofin an annular discharge, means for directing separate discharges of oiland water into the central portion of said chamber,- the inner part ofsaid head at the central portion thereof having a plurality of aperturesthrough which oil discharged into said chamber is adapted to pass inspray-like fashion, said oil and water discharging mcans comprising afeed tube through which the water is passed, said member having spiralgrooves on the periphery thereof forming oil feed grooves which openinto the chamber of said head, a tubular shaft mounted on said feedtube, and means for rotating said shaft and feed tube, and said headbeing coupled with said shaft and rotated thereby. i

6. A burner of the class described including a burner head consisting ofa conical member, said member being composed of separate sheet metalarts mounted in spaced relation to form a c lamber Within and betweensaid parts, opening outwardly through charges of oil and water into thecentral porill- . plurality tion of said chamber, the inner part of saidhead at the central portion thereof having a plurality of aperturesthrough which oil discharged into said chamber is adapted to pass inspray-like fashion, said oil andwater discharging means comprising athrough which the ber having spiral grooves on the periphery thereofforming oil feed grooves which open into the chamber of said head, atubular shaft mounted on said feed tube and means for rotating saidshaft and feed tube, said head being coupled with said shaft and rotatedthereby, and a. pan supported on said shaft and arranged adjacent thedischarge end of said head, the diameter of said pan being greater thanthe diameter of said head.

7. A burner of the class described including a' burner head consistingof 'a conical member, said member being composed of separate sheet metalparts mounted in spaced relation to form a chamber within and betweensaid parts opening outwardly through the periphery thereof in an annulardischarge, means for directing separate discharges of oil and water intothe central portion of said chamber, the inner part of said head at thecentral portion thereof having a of apertures through which oildischarged into said chamber is adapted to pass in spray-like fashion,said oil and water discharging means comprising a' feed tube throughwhich the water is passed, said member having spiral grooves on theperiphery thereof forming oil feed grooves which open into the chamberof said head, a tubular shaft mounted on said feed tube and means for rotating said shaft and feed tube, said head being coupled with said shaftand rotated thereby, a pan supported on said shaft and arranged adjacentthe discharge end of said head, the diameter of said pan being greaterthan the diameter of said head, and a fan supported on said shaft on theopposite side of the pan to direct currents of air for supply to theburner around the periphery of said pan.

8. A burner of the classrdescribed comprising a casing adapted to bearranged and positioned within the lower end portion of a furnace, atubular shaft su ported in said casing in a vertical plane, a eed tubewithin said shaft and having between the peri hery thereof and the wallof the shaft spiral y ar-- ranged oil feed grooves, means coupled withthe lower end of the casing for supplying oil to the lower ends of saidfeed grooves, means coupled with the lower end of the casing andindependent of said first named means for supplying water to thelowerend of the bore of the feed tube, and a burner head supported inconnection with the upper end of said shaft and tube and provided with aconical mixing and discharge chamber which opens downwardly into thefurnace in an annular feedtube water is passed, said memthereof and thewall of the shaft spirally arranged oil feed grooves, means coupled withthe lower .end of the casing for supplying oil to the lower ends of saidfeed grooves, means coupled with the lower end of the casing andindependent of said first named means for supplying water to the lowerend of the bore of the feed tube, a burner head supported in connectionwith the upper end of said shaft and tube and provided with a conicalmixing and discharge chamber which opens downwardly into the furnace inan annular discharge whereby oil and water may be passed into the mixingchamber of said head and converted into a gas by the heat of the head,which gas-is discharged through the annular discharge of said head,

and means associated with said head for confining the air supply to theburner to a comparatively narrow passage about the periphery of theburner head.

10. A burner of the class described comprising a casing adapted to bearranged and positioned within the lower end portlon of a furnace, atubular shaft supported in said casing in a vertical plane, a feed tubewithin said shaft and having between the periphery thereof and the wallof the shaft spirally arranged oil feed grooves, means coupled with thelower end of the casing for supplying oil to the lower ends of said feedgrooves, means coupled with the lower end of the casing and independentof said first named of said shaft and tube and provided with a I conicalmixing and discharge chamber which opens downwardly into the furnace inan annular discharge whercb y oil and water may be passed into themixing chamber of said head and converted into a gas by the heat of thehead, which gas is discharged through the annular discharge of saidhead, and means associated with said head for confining the air supplyto the burner to a comparatively narrow passage about the periphery ofthe burner head, said last named means involving a pan arranged adjacentand beneath the burner head.

7 11. A burner of the class described comprising a casing adapted to bearranged and positioned within the lower end portion of a furnace, atubular shalft supported in said casing in a vertical plane, a feed tubewithin said shaft and having between the periphery thereof and the wallof the shaft spirally arranged oil feed grooves, means coupled with thelower end of the casing for supplying oil to the lower ends of said feedgrooves, means coupled with the lower end of the casing and independentof said firstnamed means for supplying water to the lower end of thebore of. the feed tube, a burner head supported in connection with theupper end of said shaft and tubeand provided with a conical mix- 'ingand discharge chamber which opens downwardly intowthe furnace in anannular discharge whereby oil and water may be passed into the mixingchamber of said head and converted into a gas by the'heat of the head,which gas is discharged through the annular discharge of said head,means asso-.

ciated with said head for confining the air supply to the burner to acomparatively narrow passage about the periphery of the burner head,sa1d last named means involving apan arranged adjacent and beneath theburner head, and a'fan arranged beneath the pan and coupled with saidshaft. v

'12, A burner of the class described Comprising a casing adapted to bearran ed-and positioned within the lower end portion of a furnace, atubular shaft supported in said casing in a vertical plane, a feed tubewithin said shaft and having between the periphery thereof'and the wallof the shaft spirally arranged oil feed grooves, means coupled with thelower end of the casing for supplying oil to the lower ends of said feedgrooves,

'means coupled with the lower end of thecasing and independent of saidfirst named means for supplyin water to the lower end of the bore of theeedtube, a burner head supported in connection with the upper end ofsaid shaft and. tube and provided witha conical mixing and dischargechamber which opens downwardly into the furnace in an annular dischargewhereby 011 and water may be passed into the mixing chamber of said headand converted into a gas by the heat neath the fan and encircling saidshaft, and

a shutter device for controlling the area of said passage. I

13. A burner of the class described comprising a casing adapted to bearranged and positioned within the lower end portion of a furnace, atubular shaft supported in said casing in a vertical plane, a feed tubewithin said shaft and having between the periphery thereof and the wallof the shaft spirally ar- .and discharge chamber which opens downwardlyinto the furnace in an annular discharge whereby oil and water ma bepassed into the mixing chamber of sai head and converted into a gas bythe heat of the head, which gas is discharged through the annulardischarge of said head means associated withsaid headfor confining theair supply to the burner to a comparatively narrow passage about theperiphery of the burner head, said last namedmeans involving a panarranged adjacent and beneath the burner head, a fan arranged beneaththe pan and coupled with said shaft, said casing including an air supplypassage arranged beneath the fan and encircling said shaft, a shutterdevice for controlling the area of said pasasge, and a power drivenshaft coupled with the casing and arranged at right angles to and at oneside of said vertical shaft, and means for gearing said shaftstogether.

' 14. A burner of the class described C0111- prising a casing adapted tobe arranged and positioned within the lower end ortion of a furnace, atubular shaft supporte in said casing in a vertical plane, a feed tubewithin said shaft and having between the periphery thereof'and the wallof the shaft, spirally arranged oil feed grooves, means coupled with thelower end of the casing for supplyingoil to the lower ends of said feedgrooves, means coupled with the lower end of the casing and-independentof said first namedmeans for supplying water to the lower end of thebore of the feed tube, a burner head supported in connection with theupper end of said shaft and tube and provided with aconical mixing anddischarge chamber which opens downwardly into the furnace in an annulardischarge whereby oil and water may be passed into the mixing chamber ofsaid head and converted into a gas by the heat of the head, which gas isdischarged through the annular discharge of said head, means associatedwith said head for confining the air supply to the burner to acompartively narrow passage about the periphery of the burner head, saidlast named means involving a pan arranged adjacent and beneath theburner head, a fan arranged beneath the pan and coupled with said shaft,said casing including an air supply passage arranged beneath the fan andencircling said shaft, a shutter device for controlling the area of saidpassage, a power driven'shaft coupled wit-h the casing and arranged atright an les to and at one side of said vertical shaft and means forgearing said shafts together,-

independent valves for con-trolling the supply of water and gas to theburner and a governor device on said power driven shaft and in operativeconnection with both of said valves for automatically controlling andregulating the oil and water supply to the burner.

15. A burner of the'class described comprising a casing adapted to bearranged and positioned within the lower end portion of a furnace, atubulai shaft supported in said casing in a vertical plane, a feed tubewithin said shaft and having between the periphery thereof and the wallof the shaft, spirally arranged oil feed grooves, means coupled with thelower end of the casing for supplying oil to the lower ends of said feedgrooves, means coupled with the lower end of the casing and independentof said first named means for supplying water to the lower end of thebore of the feed tube, a burner head supported in connection with theupper end of said shaft and tube and provided with a conical mixing anddischarge chamber which opens down wardly into the furnace in an annulardischarge whereby oil and water may be passed into the mixing chamber ofsaid head and converted into a gas by the heat of the head, which gas isdischarged through the annular discharge of said head, means associatedwith said head for confining the air supply to the burner to acomparatively narrow passage about the periphery of the burner head,said last named means involving a pan arranged adjacent arranged beneaththe pan and coupled with said shaft, said casing including an air supplypassage arranged beneath the fan and encircling said shaft, a shutterdevice for controlling the area of said passage, a power driven shaftcoupled with the casing and arranged at right angles to and at one sideof said vertical shaft and means for gearing said shafts together,independent valves for controlling the supply of water and gas to theburner and a governor device on said'power driven shaft and in operativeconnection with both of said valves for automatically controlling andregulating the oil and water supply to the burner, an oil chamberinterposed between the mixing chamber of said head and the upper end ofthe grooves in said feed tube, and a plurality of apertures throughwhich the oil is discharged from said last named chamber into the mixingchamber.

16. In a burner of the class described, a rotatable burner unitcomprising a conical head provided with a conical mixing cham ber havingan annular discharge at the periphery of said head, a pan adj aeent thedischarge of said head, the diameter of which is greater than thediameter of said head, a fan at the opposite side of said pan, a tubularand beneath the burner head, a fan shaft on which said head, pan and fanare mounted and by means of which the same are rotated, means forrotating said shaft and a feed tube in said shaft and having independentoiland water feed passages extending longiti idinally thereof andopening into the mixing chamber of said head whereby in the rotation ofsaid unit, oil and water will'be discharged into said mixing chamber toproduce by reason of the heat of said head, a gas which is dischargedthrough said annular discharge. 7

17. In a burner of the class described, a rorotatable burner unitcomprising a conical head provided with a conical mixing chamber havingan annular discharge at the periphery of said head, a pan adjacent thedischarge of said head, the diameter of which is greater than thediameter of said head, a fan at the opposite side of said pan, a tubularshaft on which said head, pan and fan are mounted and by means of whichthe same are rotated, means for rotating said shaft, a feed tube in saidshaft and having independent oil and water feed passages extendinglongitudinally thereof and opening into the mixing chamber of said headwhereby in the rotation of said unit, oil and water will bedischargedinto said mixing chamber to produce by reason of the heat of said head,a gas which is discharged through said annular discharge, acasing forsupporting said unit and the means for actuating said shaft, andindependent oil and water pipes coupled with said casing and incommunication with the oil and water passages of said feed tube. V

18. In a burner ofuthe class described, a rotatable burner unitcomprising a conical head provided with a conical mixing chamberhaving'an annular discharge at the periphery of said head, a panadjacent the discharge of said head, the diameter of which is greater thanthe diameter of said head, a fan at the opposite sideof said pan, atubular shaft on which said head, pan and fan are mounted and by meansof which the same are rotated, meansfor rotating said shaft, a feed tubein said shaft and having independent oil and water feed passagesextending longitudinally thereof and opening into the mixing chamber ofsaid head whereby in the rotation of said unit, oil and water will bedischarged into said mixing chamber to produce by reason of the heat' ofsaid head, a gas which is discharged through said annular discharge, acasing for supporting said unit and the means for actuating said shaft,independent oil and water pipes coupled with said casing 19. A has, ofthe class described including a burner head consisting of a conicalmember, said member being composed of separate sheet metal partsmounted-in spaced relation to form a chamber of substantially the samewidth throughout and within and between said parts, said chamber openingoutwardly through the periphery of said member in anannular discharge,and means for directing separate discharges of oil and Water directlyinto the central portion of said chamber.

20. A burner of theclass described including a burner head consisting ofa conical member, said member beingcomposed of separate sheet metalparts mounted in spaced relation to form a chamber of substantially theapertures through which oil discharged into said chamber is adapted topass in sway-like fashion.

In testimony that I claim the foregoing as my invention I have signed myname this 8th day of April, 1927.

PER F. HOLMGREN.

